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SETH PECK SPENCER, OF LANCASTER, PENNSYLVANIA, ASSIGNOR TO HIMSELF, S. S. SPENCER, AND HARRIS BOARDMAN, ALL OF SAME PLACE.

DRAWING-ROLLER.

Specication of Letters Patent No. 20,766, dated June 29, 1858i.

To (zZZ 'whom it may concern Be it known that I, SETH PECK SPENCER, of Lancaster, in the county of Lancaster and State of Pennsylvania, have invented a new and useful Improvement in Drawing-Rollers for Drawing Cotton and other Fibrous Substances; and I do hereby declare that the following is a full, clear, and exact descriptio-n of thesame, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a transverse vertical section of a set of drawing rollers of which the front pair are constructed according to our invention. Fig. 2, is a front view of the same. Fig. 3, is a front view of one part of the front pair of rollers, representing the top roller partly in section.

Similar letters of reference indicate corresponding parts in the three figures.

This invention consists in a certain construction of drawing rollers which not only insures a much more perfect drawing but reduces the first cost of the rollers and also ,the cost of keeping them in repair.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, is the bottom roller and B the top roller of the front pair, which are, as is usual, double rollers, that is to say, made to draw two slivers at a. time. The bottom roller A, is of iron and has two grooves (Z, (Z, of semicircular semi-elliptic, or other substantially similar form turned in them of sufficient width to receive the sliver to be drawn. The top roller is turned to receive two stout collars e, e, of solid leather such as is used for bootsoles, which collars are clamped securely to the roller by nuts (Z, (L, metal washers Z), Z9, and fixed collars c, c. These leather collars, which are the operative portions of the top roller, have their peripheries turned to lit the grooves (Z, (Z, in the lower rollers.

The sliver to be drawn passes between the rounded peripheries of the leather collars e, e, and the grooves (Z, (Z, which take hold of it so firmly as to insure a more perfect drawing and consequently a more perfect yarn than is obtained by the ordinary construction of drawing roller. This improved effect is mainly due to the tendency of the solid leather collars-which in fact may be considered as solid leather rollers-to fit themselves to the grooves in which they run. Besides, producing this improved effect, however, my invention makes t-he first cost of the top drawing rollers and the cost of keeping them in repair much less than of the top rollers of the ordinary construction, that is to say, of plain cylindrical form with a covering of sheep or calf skin.

Drawing rollers constructed according to my invention may be applied, arranged, and controlled in the same manner as those constructed on the old plan.

The cost of keeping my rolls in repair is not more than the one-eighth part as much; as the plain top roll requires re-covering once in every 3 or t months; while my improved roll will last and continue to do good work for years without any repairs, since the formation of the grooves ((Z) is such as to prevent the collars (c) from flattening or getting out of shape. The plain top roll, bearing its whole length on the bottom roll, soon becomes worn or indented where the cotton passes between them, and this allows the cotton to slip through without being properly drawn; whereas, in my improved roll, the constant tendency of the leather collar to press itself into the lowest part of the groove in which it works, keeps it always nicely fitted to the groove, so as to hold firmly every ber of cotton as it passes through, and thus insures a more perfect drawing and consequently a more perfect yarn. My improvement also requires much less labor from the operative, to keep it clean when in use, for there is less flat surface to be watched and kept in order.

Having thus described my invention, I claim and desire to secure by Letters Patent- Providing the lower roller with grooves ((Z), and the upper roller with leather collars (c), the said collars (c) being arranged to run in the grooves ((Z), substantially as and for the purposes herein set forth and described.

SETH PECK SPENCER. l/Vitnesses:

AMos BLAIR, L. F IGKEN. 

